US3537900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deicing aircraft windscreens
Assignee: Kilfrost Ltd
•
Filing: 1967-09-08
•
Granted: 1970-11-03
•
Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Stuart Halbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/263; C11D7/32; C11D7/3227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2399267A
Cited
US2454886A
Cited
US2677630A
Cited
US2775533A
Cited
US3245912A
Cited
US3239467A
Cited
US3249550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |